On Saturday, October 27, 2018 at 5:41:22 PM UTC+2, agrays...@gmail.com wrote: > > > > On Saturday, October 27, 2018 at 3:20:23 PM UTC, John Clark wrote: >> >> On Fri, Oct 26, 2018 at 5:40 PM <agrays...@gmail.com> wrote: >> >> *> the concept of a plane wave, one of the solutions of Maxwell's >>> equations. It certainly doesn't exist in THIS universe* >> >> >> I agree with the general point you're trying to make, just because >> something can be consistently described mathematically doesn't prove it >> must exist physically. However if you're interested in the waves that enter >> your radio telescope and consider them to be plane waves the error in doing >> so can be made arbitrarily small by increasing the distance from the point >> source or by decreasing the size of the antenna. As a practical matter >> because the things astronomers study are so distant and their antennas are >> so small they can treat the waves they're interested in as plane waves and >> produce no measurable error by doing so. But a designer of optical >> microscopes would not have that luxury because the lens of a microscope is >> large compared to the distance from the sample, so he could not treat them >> as plane waves. >> >> John K Clark >> > > *A spherical wave asymptotically approaches a plane wave as it progresses > in space and time, but it never becomes a plane wave. This where the rubber > hits the road for the MUH; we have a mathematical construct that doesn't > exist in physical reality. Moreover, since the amplitude along the wave > front is a plane, the wave changes instantaneously in every direction along > the plane for every increment of time however small, which I refer to as > "instantaneous with a vengeance". So, as far as I am concerned the MUH is > easily falsified, and why it continues to interest people is baffling. AG* > >> >> > What is baffling is why you think that your example falsifies MUH. If a plane wave is logically impossible then it doesn't exist - MUH is intact. If a plane wave is logically possible then exists, in a universe with instantaneous action at a distance if necessary - MUH is intact.
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